Used as a key intermediate in the synthesis of complex peptide-based pharmaceuticals, particularly in the preparation of protease inhibitors. Its protected amine and hydroxyl groups allow for selective coupling reactions, making it valuable in solid-phase peptide synthesis. The presence of the tosyloxy group enables displacement reactions for carbon-carbon bond formation, while the bulky protecting groups enhance stereochemical control during multi-step syntheses. Commonly employed in the development of antiviral and anticancer agents where precise chirality and functional group compatibility are critical.